Optical driving mechanism

ABSTRACT

An optical driving mechanism is provided, configured to force an optical element, including a base, a movable portion, and a driving portion. The movable portion is disposed and connected to the base. The movable portion includes a holder configured to sustain the optical element, a magnetic element, and a fixing member. The magnetic element and the fixing member are affixed to the holder, wherein the fixing member has a permeable material. The driving portion is configured to force the movable portion to move relative to the base, wherein the driving portion includes a piezoelectric element and a support member connecting thereto. The piezoelectric element and the support member are disposed on the base and connected to the movable portion. The fixing member makes contact with the support member via a magnetic attraction force between the magnetic element and the fixing member.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of application Ser. No. 15/966,377,filed on Apr. 30, 2018, which claims the benefit of U.S. ProvisionalApplication No. 62/508,581, filed on May 19, 2017, and China PatentApplication No. 201810211592.X, filed on Mar. 15, 2018, the entirety ofwhich are incorporated by reference herein.

BACKGROUND OF THE INVENTION Field of the Invention

The application relates in general to an optical driving mechanism, inparticular to an optical driving mechanism for driving a holder and anoptical element via a piezoelectric element.

Description of the Related Art

Thanks to ongoing technological developments, recent electronic devices(such as tablet computers and smartphones) usually include a lens modulecapable of aiding in photography or recording video, or are evenequipped with dual lens modules, bringing users a wealth of visualenjoyment. However, an image may come out blurry if the user shakes thelens module in the electronic device when using it. To improve imagequality, it is increasingly important to design a smaller andeffectively shockproof lens module. At present, a piezoelectric impactdriving mechanism (or a smooth impact driving mechanism) is provided inthe electronic device to correct for lens shake and provide a properfocus. Conventional piezoelectric actuators mostly rely on springs tohold the piezoelectric components, but the springs deform easily whenthey are subjected to strong external impact. This may cause the springsto be unable to hold the piezoelectric component stably, even to thepoint at which the entire spring is no longer in contact with thepiezoelectric component, so that the optical driving mechanism cannotoperate normally. People pursue high quality and high-quality electronicproducts, whereby it is increasingly important to design an opticaldriving mechanism which is shockproof and highly stable inside theelectronic device.

BRIEF SUMMARY OF INVENTION

To address the deficiencies of conventional products, an embodiment ofthe invention provides an optical driving mechanism, configured to forcean optical element, comprising a base, a movable portion, and a drivingportion. The movable portion is disposed and connected to the base, andincludes a holder configured to sustain the optical element, a magneticelement, and a fixing member. The magnetic element and the fixing memberare affixed to the holder, wherein the fixing member has a permeabilitymaterial. The driving portion is configured to force the movable portionto move relative to the base, wherein the driving portion includes apiezoelectric element and a support member connecting thereto. Thepiezoelectric element and the support member are disposed on the baseand connected to the movable portion. The fixing member makes contactwith the support member via a magnetic attraction force between themagnetic element and the fixing member.

In some embodiments, the fixing member has a fixing portion, acorresponding portion and a contact portion, the fixing portion isaffixed to the holder, the corresponding portion and the magneticelement are attracted to each other via the magnetic attraction force,and the contact portion makes contact with the support member, whereinthe corresponding portion is situated between the fixing portion and thecontact portion.

In some embodiments, the magnetic element is fully covered by the fixingmember in a direction that is perpendicular to the optical axis of theoptical element. In some embodiments, the movable portion furtherincludes a sliding member disposed on the holder and in contact with thesupport member. In some embodiments, the sliding member, the fixingmember and the support member form at least three contact areas. In someembodiments, the optical driving mechanism further comprises a pluralityof fixing members disposed on the side of the holder, and the fixingmembers and the sliding member form at least three contact areas.

In some embodiments, the fixing member has an L-shaped structure, andone end of the L-shaped structure is corresponding to another magneticelement on the holder. In some embodiments, the optical drivingmechanism further comprises an alignment element that is adjacent to thefixing member and that corresponds to the magnetic element.

In some embodiments, the optical driving mechanism further comprises acircuit board assembly disposed on the base, and the circuit boardassembly and the driving portion are located on the same side of thebase, wherein the alignment element is disposed on the circuit boardassembly. In some embodiments, the piezoelectric element is in directcontact with the circuit board assembly.

In some embodiments, the optical driving mechanism is configured todrive a plurality of optical elements. The optical driving mechanismfurther comprises a plurality of movable portions and a plurality ofdriving portions. The base has a substantially rectangular structure.The driving portions and the movable portions are disposed on the base.The driving portions are arranged on the same side of the base andsituated at two adjacent corners of the base.

Another embodiment of the invention provides an optical drivingmechanism, configured to drive an optical element, comprising: a base, amovable portion, and a driving portion. The base includes a firstmagnetic element. The movable portion is connected to the base andincludes a holder configured to sustain the optical element and a secondmagnetic element disposed on the holder, wherein the second magneticelement is corresponding to the first magnetic element. There is amagnetic repulsion force between the second magnetic element and thefirst magnetic element. The driving portion is configured to drive themovable portion to move relative to the base, and the driving portionincludes a piezoelectric element and a support member. The supportmember is connected to the piezoelectric element, wherein thepiezoelectric element and the support member are disposed on the baseand connected to the movable portion. The holder makes contact with thesupport member via the magnetic repulsion force.

In some embodiments, the movable portion further includes a slidingmember disposed on the holder and in contact with the support member. Insome embodiments, the base further includes a plurality of firstmagnetic elements, the movable portion further includes a plurality ofsecond magnetic elements, each the first magnetic element is correspondto each second magnetic element, and there is a plurality of magneticrepulsion forces in different directions between the first magneticelements and the second magnetic elements.

In some embodiments, the optical driving mechanism is configured todrive a plurality of optical elements. The optical driving mechanismfurther comprises a plurality of movable portions and a plurality ofdriving portions. The base has a substantially rectangular structure,the driving portions and the movable portions are disposed on the base,and the driving portions are arranged on the same side of the base andsituated at two adjacent corners of the base.

In some embodiments, the optical driving mechanism is configured todrive a plurality of optical elements. The optical driving mechanismfurther comprises a plurality of movable portions and a plurality ofdriving portions. The base has a substantially rectangular structure,the driving portions and the movable portions are disposed on the base,and the driving portions are arranged on the different sides of the baseand situated at two diagonal corners of the base.

BRIEF DESCRIPTION OF DRAWINGS

The invention can be more fully understood by reading the subsequentdetailed description and examples with references made to theaccompanying drawings, wherein:

FIG. 1 is an exploded view of an optical driving mechanism according toan embodiment of the invention.

FIGS. 2-3 are schematic diagrams of the optical driving mechanism inFIG. 1 after assembly (the housing 50 is omitted).

FIG. 4 is a partial schematic diagram of another viewing angle in FIG.2.

FIG. 5 is a schematic diagram of an optical driving mechanism accordingto another embodiment of the invention.

FIGS. 6A-6B are schematic diagrams of an optical driving mechanismaccording to another embodiment of the invention.

FIG. 7 is a schematic diagram of an optical driving mechanism accordingto another embodiment of the invention.

FIG. 8 is a schematic diagram of an optical driving mechanism accordingto another embodiment of the invention.

FIG. 9 is a schematic diagram of an optical driving mechanism accordingto another embodiment of the invention.

FIG. 10 is a schematic diagram of the optical driving mechanism in FIG.9 after assembly (the housing 50 is omitted).

FIG. 11 is a schematic diagram of an optical driving mechanism accordingto another embodiment of the invention.

FIG. 12 is a schematic diagram of an optical driving mechanism accordingto another embodiment of the invention.

FIG. 13 is a schematic diagram of an optical driving mechanism accordingto another embodiment of the invention.

FIG. 14 is a schematic diagram of an optical driving mechanism accordingto another embodiment of the invention.

DETAILED DESCRIPTION OF INVENTION

The making and using of the embodiments of the optical drivingmechanisms are discussed in detail below. It should be appreciated,however, that the embodiments provide many applicable inventive conceptsthat can be embodied in a wide variety of specific contexts. Thespecific embodiments discussed are merely illustrative of specific waysto make and use the embodiments, and do not limit the scope of thedisclosure.

Unless defined otherwise, all technical and scientific terms used hereinhave the same meaning as commonly understood to one of ordinary skill inthe art to which this invention belongs. It should be appreciated thateach term, which is defined in a commonly used dictionary, should beinterpreted as having a meaning conforming to the relative skills andthe background or the context of the present disclosure, and should notbe interpreted in an idealized or overly formal manner unless definedotherwise.

Embodiment 1

FIG. 1 is an exploded view of an optical driving mechanism 1 accordingto an embodiment of the present invention. The optical driving mechanism1 is, for example, a mechanism that can drive and sustain an opticalelement (such as a lens; not shown), and can be disposed inside anelectronic device (such as a camera, tablet, or mobile phone). Theoptical element can be moved by the optical driving mechanism 1 relativeto an image sensor in the electronic device to achieve auto-focusing(AF) or optical image stabilization (OIS) for improving image quality.

As shown in FIG. 1, the optical driving mechanism 1 primarily comprisesa housing 50, a base 10, a movable portion V, and a driving portion D.The movable portion V and the driving portion D are disposed on the base10 and are located in and protected by the housing 50. The movableportion V includes a holder 30 that can sustain an optical element (forexample, an optical lens), wherein an image sensor (not shown; forexample, can be disposed below the base 10) in the electronic device canreceive the light from the outside through the optical element (from thedirection of the optical axis O of the optical element), to acquire theimage.

Please refer to FIGS. 1 to 2, wherein FIG. 2 is a schematic diagram ofthe optical driving mechanism 1 of FIG. 1 after assembly (the housing 50is omitted). The movable portion V is connected to the driving portionD. The movable portion V includes the holder 30, a magnetic element M,and a fixing member 40. The driving portion D includes a piezoelectricelement 60 and a support member 70 and a weight member 80. It should benoted that, the driving portion D in this embodiment is, for example, apiezoelectric impact driving assembly (or Smooth Impact DrivingAssembly, SIDM Assembly), and a driving signal (for example, a drivingcurrent) applied to the piezoelectric element 60 in the driving portionD can cause the piezoelectric element 60 to deform, for example, extendor shorten, so as to drive the movable portion V (including the holder30 and the optical element carried by the holder 30) to move relative tothe base 10, to achieve optical focus and shake compensation. Theconnection relationship between the movable portion V, the drivingportion D and the base 10 is described in detail below.

Please also refer to FIG. 2, the driving portion D and the movingportion V are disposed on the base 10 and surrounded by the fourprotrusions (or studs) 10-1, 10-2, 10-3 and 10-4 of the base 10. Thesupport member 70 of the driving portion D has a cylindrical structuresandwiched between the holder 30 and the protrusion 10-1 and is incontact with the fixing member 40. The fixing member 40 is, for example,a rod-shaped elastic sheet having or made of permeable material and isdisposed on the lateral side 31 of the holder 30 to press the supportmember 70 against the holder 30 (for example, pressing the supportmember 70 on the side edge 31), so that the support member 70 is stablyabutted against the holder 30.

In addition, as shown in FIG. 3, on the other side of the base 10 (i.e.,with respect to the side on which the fixing member 40 and the drivingportion D are provided), a circuit board assembly F is provided, whichis, for example, a flexible printed circuit board assembly (FPCBA) isconnected to the piezoelectric element 60 of the driving portion D by awire W, and can apply a driving signal (for example, a current) to thepiezoelectric element 60 so as to be elongated or shortened to move themovable portion V relative to the base 10, so as to achieve the purposeof focusing and shockproof.

It should be noted that the protrusion 10-3 of the base 10 has aU-shaped groove R1, and the holder 30 has a protruding part R2. Thegroove R1 and the protruding part R2 match each other. When the holder30 is assembled on the base 10, the matching (or engaging) through thegroove R1 and the protrusion R2 can provide a good positioningmechanism, and can improve the assembly tightness of the optical drivingmechanism 1.

In the present embodiment, the optical driving mechanism 1 furthercomprises an alignment assembly (or positioning assembly) P includingtwo alignment elements P1 and P2. As shown in FIGS. 2 to 3, thealignment elements P1 and P2 are corresponding to each other andrespectively disposed on the base 10 and the movable portion V (forexample, respectively disposed on the side of the protrusion 10-2 of thebase 10 and the holder 30 of the movable portion V). The alignmentelement P1 may be a permanent magnet or a Hall effect sensor, whereinthe alignment element P2 is the other of the two. The Hall effect sensormay determine the position of the permanent magnet by detecting changesin the magnetic field of the permanent magnet, so that it is possible todetect the displacement of the movable portion V relative to the base 10due to the vibration. In another embodiment, other types of alignmentelements/components, such as a magnetoresistive sensor (MRS) or anoptical sensor, may also be used to detect the relative position ofmovable portion V and the base 10.

Regarding the driving portion D driving the movable portion V to moverelative to the base 10, for example, when an appropriate drive signalis applied to the piezoelectric element 60 to be elongated, the supportmember 70 on the piezoelectric element 60 follows the direction of theoptical axis O (Z axis) moves upwards, and the piezoelectric element 60and the support member 70 move the movable portion V in the direction ofthe optical axis O to a predetermined height (position); when anappropriate drive signal is applied again to the piezoelectric element60 and the piezoelectric element 60 shortens rapidly, the support member70 returns to the initial position, and the movable portion V can bemaintained at the aforementioned predetermined height. The position ofthe movable portion V relative to the base 10 can be adjusted byrepeatedly performing the drive signal of elongating and shortening ofthe voltage element 60, so that the optical driving mechanism 1functions well at focusing and at compensation for lens shake.

It should be noted that a magnetic element M (for example, a magnet) isprovided on the side 31 of the base 10 that faces the fixing member 40.There is a magnetic attraction force between the fixing member 40containing permeable material and the magnetic element M. This magneticattraction force will cause the fixing member 40 to more stably hold thesupport member 70 perpendicular to the optical axis O (in the arrowdirection A1). More specifically, the fixing member 40 may be dividedinto at least three portions: a fixed portion 401, a correspondingportion 402 and a contact portion 403. The fixed portion 401 and theholder 30 are affixed to each other, and the corresponding portion 402attracts the magnetic element M through the aforementioned magneticattraction force, and the contact portion 403 is in contact with thesupport member 70. In this way, when the optical driving mechanism 1provided in the electronic device is subjected to a strong externalimpact, the fixed member 40 can be held firmly by the magneticattraction force between the fixing member 40 and the magnetic elementM. Therefore, the support member 70 of the driving portion D can be heldfirmly by the fixing member 40. Situations where the fixing member 40cannot stably hold the support member 70 due to a permanent deformityare prevented.

FIG. 4 is a partial schematic view of another view of FIG. 2, whereinthe protrusion 10-1 of the base 10 is omitted. As can be seen from FIGS.1 and 4, a sliding member 35 (having a V-shaped structure) is providedon the side of the holder 30 and is in contact with the support member70. The sliding member 35 has a smooth surface. At least three contactareas are formed between the fixing member 40 and the sliding member 35and the support member 70 to stably hold the support member 70 becausethe fixing member 40 and the sliding member 35 are in contact with thesupport member 70. Furthermore, the driving portion D includes theaforementioned weight member 80 which is disposed below thepiezoelectric element 60 to protect it. The weight member 80 may be madeof, for example, a metal material and can provide the effect ofstabilizing the entire driving portion D.

As described above, a magnetic attraction force generated by the fixingmember 40 and the magnetic member M acts on the holder 30, and thedriving portion D (and the support member 70 thereof) is pressed againstthe holder member 30 by the fixing member 40, to prevent or reducepermanent deformation of the fixing member 40 (due to external impact)so as not to hold or contact the driving portion D. This greatlyimproves the optical driving mechanism 1.

Embodiment 2

FIG. 5 is a schematic view of an optical driving mechanism 2 accordingto another embodiment. The main difference between the presentembodiment and the foregoing embodiment (FIG. 1) is that the fixingmember 40′ of the optical driving mechanism 2 is different from theaforementioned fixing member 40, and the housing 50 is omitted for clearto see the internal structure of the optical driving mechanism 2. Othercomponents are the same or substantially the same or only a slightdifference in appearance, which are not described here again. Comparedto the aforementioned fixing member 40, the corresponding portion 402′of the fixing member 40′ has a larger area, and its width in thedirection of the optical axis O (Z-axis) is greater than that of thefixing portion 401′ and the contact portion 403′. The correspondingportion 402′ completely covers the magnetic element M (in the directionperpendicular to the optical axis O). A stronger magnetic attractionforce can be generated between the fixing member 40′ and the magneticelement M by having a larger corresponding area, so that the supportmember 70 can be more firmly clamped by the fixing member 40′.

Embodiment 3

In another embodiment, as shown in FIGS. 6A-6B, an optical drivingmechanism 3 further comprises two fixing members 40 and two magneticelements M which correspond. One fixing member 40 and one magneticelement M are disposed on the side 31 of the holder 30, and anotherfixing member 40 and another magnetic element M are disposed on the side32 of the holder 30, wherein the sides 31 and 32 are adjacent to eachother. The magnetic attraction forces generated between the two sets offixing members 40 and the magnetic elements M will allow the fixingmembers 40 to more stably hold the support member 70. In addition, asshown in FIG. 6B, two fixing members 40, a sliding member 35′ (having astrip structure) and the support member 70 form at least three contactareas, so as to improve the stability of clamping the support member 70.Moreover, the base 10 of the present embodiment does not have theaforementioned protrusion 10-1 (FIG. 1), which only has threeprotrusions 10-2, 10-3 and 10-4. Thus, the overall volume of themechanism can be reduced.

Embodiment 4

In another embodiment, as shown in FIG. 7, an optical driving mechanism4 comprises an L-shaped fixing member 40″ that forms at least twocontact areas with the support member 70. One end of the L-shapedstructure of the fixing member 40″ is formed with another correspondingportion 404″, and a magnetic attraction force is generated between thecorresponding portion 404″ and the other magnetic element M on theholder 30, to stabilize the driving portion D.

Embodiment 5

In another embodiment, as shown in FIG. 8, the driving portion D and thecircuit board assembly F of an optical driving mechanism 5 are disposedon the same side of the holder 30, and the piezoelectric element 60′ isconnected to the circuit board assembly F on the base 10 (thepiezoelectric element 60′ may be in direct contact with the circuitboard assembly F to save on wire W as in the first embodiment). Itshould be noted that alignment elements P3 on the circuit board assemblyF and the magnetic element M constitute an alignment assembly P fordetermining the relative position of the movable portion V and the base10. In this way, the magnetic element M has two functions: one is togenerate magnetic attraction force with the fixing member 40 so that thefixing member 40 can stabilize the support member 70; and the other isto align with the alignment member P3 to constitute the alignmentassembly P, which is configured to detect the relative position of themovable portion V and the base 10. With this arrangement, not only canthe overall volume of the optical driving mechanism 5 be reduced(because both the drive portion D and the circuit board assembly F areprovided on the same side of the holder 30), but the magnetic member Mcan also be used as an alignment element, to save on the number ofalignment components.

Embodiment 6

FIGS. 9-10 are schematic exploded and after assembly views of theoptical driving mechanism 6 according to another embodiment of thepresent invention (the housing 50 is omitted). The main differencebetween the optical driving mechanism 6 and the aforementioned opticaldriving mechanism 1 (FIG. 1) is that the optical driving mechanism 6comprises a plurality of magnetic elements: the first magnetic elementM1 and the second magnetic element M2 are respectively arranged on therecess R1 of the protrusion 10-3 of the base 10 and the protrusion R2 ofthe holder 30. In addition, the optical driving mechanism 6 does notinclude the fixing member 40 of the optical driving mechanism 1. Othercomponents are the same or almost the same or have only a slightdifference in appearance, which are not described here again.

In detail, referring to FIG. 10, a magnetic repulsion force between thefirst and second magnetic elements M1 and M2 (e.g., magnets) of theoptical driving mechanism 6, so that the holder 30 is toward the arrowdirection A2 in FIG. 10 to abut against the support member 70 and theprotrusion 10-1 by the first and second magnetic elements M1 and M2repelling each other. In this way, the support member 70 is sandwichedbetween the protrusion 10-1 and the holder 30 (the holder 30 makescontact with the support member 70 by the aforementioned magneticrepulsion force), so that the driving portion D including the supportmember 70 can be steadily clamped.

Embodiment 7

FIG. 11 is a schematic diagram of an optical driving mechanism 7according to another embodiment of the present invention. The maindifference between the optical driving mechanism 7 of the presentembodiment and the aforementioned optical driving mechanism 6 (FIG. 10)is that the optical driving mechanism 7 has a plurality of first andsecond magnetic elements M1 and M2. The two first magnetic elements M1are respectively disposed on the protrusions 10-2 and 10-4, and the twosecond magnetic elements M2 are disposed on the holder 30 (respectivelydisposed on different sides of the holder 30) and respectivelycorrespond to the two first magnetic elements M1. Similar to theembodiment shown in FIG. 10, each pair of the first and second magneticelements M1 and M2 in this embodiment generate a magnetic repulsionforce, and theses magnetic repulsion forces provide the holder 30 topress against the support member 70 in the directions A3 and A4 (indifferent directions), so that the holder 30 tightly abuts the supportmember 70, and the support member 70 can be stably sandwiched betweenthe holder 30 and the protrusion 10-1. In addition, the circuit boardassembly F and the alignment element P4 disposed thereon (correspondingto the alignment element P5 provided on the holder 30) are disposed onthe side 31 of the holder 30, that is, they are on the same side as thedrive portion D. Thus, the overall volume of the optical drivingmechanism 7 can be reduced.

Embodiment 8

FIG. 12 is a schematic diagram of an optical driving mechanism 8according to another embodiment of the present invention. The opticaldriving mechanism 8 is configured to sustain and drive a plurality ofoptical elements. The optical driving mechanism 8 is substantiallycomposed of two of the aforementioned optical driving mechanisms 5 (FIG.8). The base 10 is configured to carry two movable portions V and twodriving portions D. With regard to the arrangement of the opticaldriving mechanism 8, as shown in FIG. 12, the two driving portions D areprovided on the same side of the base 10 and are respectively located attwo adjacent corners of the base 10.

Embodiment 9

FIG. 13 is a schematic diagram of an optical driving mechanism 9according to another embodiment of the present invention. The opticaldriving mechanism 9 is configured to sustain and drive a plurality ofoptical elements. The optical driving mechanism 9 is substantiallycomposed of two of the aforementioned optical driving mechanisms 7 (FIG.11). The base 10 is configured to carry two movable portions V and twodriving portions D. With regard to the arrangement of the opticaldriving mechanism 9, as shown in FIG. 13, the two drive portions D areprovided on different sides of the base 10 and are located substantiallyat two corners of the base 10 which are diagonally opposite to eachother (obliquely).

Embodiment 9X

FIG. 14 is a schematic view of an optical driving mechanism 9X accordingto another embodiment of the present invention. The optical drivingmechanism 9X is configured to sustain and drive a plurality of opticalelements. The optical driving mechanism 9X is similar to theaforementioned optical driving mechanism 9 (FIG. 13). The maindifference is that the optical driving mechanism 9X comprises a commonmagnetic element M5 disposed between the two holders 30. The oppositesides of the common magnetic element M5 respectively correspond to thetwo magnetic elements M2 respectively provided on the two holders 30.The number of magnetic elements in the mechanism can be reduced by usingthe common magnetic element M5, so as to reduce production and assemblycosts.

In summary, the present invention provides an optical driving mechanism,configured to force an optical element, comprising a base, a movableportion, and a driving portion. The movable portion is disposed andconnected to the base, including a holder configured to sustain theoptical element, a magnetic element, and a fixing member. The magneticelement and the fixing member are affixed to the holder, wherein thefixing member has or is made of a permeable material. The drivingportion is configured to force the movable portion to move relative tothe base, wherein the driving portion includes a piezoelectric elementand a support member connected thereto. The piezoelectric element andthe support member are disposed on the base and connected to the movableportion. The fixing member makes contact with the support member via amagnetic attraction force between the magnetic element and the fixingmember. As a result, the occurrence of permanent deformation of thefixing member due to external impact which results in the inability tohold or contact with the drive portion can be avoided or reduced, whichgreatly improves the optical driving mechanism. In another embodiment,the optical driving mechanism comprises a plurality of magneticelements: the first and second magnetic elements which are respectivelydisposed on the base and the holder, wherein the holder makes contactwith the support member by a magnetic repulsion force between the firstand second magnetic elements so that the holder abuts against thedriving portion stably.

Use of ordinal terms such as “first”, “second”, “third”, etc., in theclaims to modify a claim element does not by itself connote anypriority, precedence, or order of one claim element over another or thetemporal order in which acts of a method are performed, but are usedmerely as labels to distinguish one claim element having a certain namefrom another element having the same name (but for use of the ordinalterm) to distinguish the claim elements.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the invention. It isintended that the standard and examples be considered as exemplary only,with the true scope of the disclosed embodiments being indicated by thefollowing claims and their equivalents.

What is claimed is:
 1. An optical driving mechanism, comprising: a fixedportion; a movable portion, configured to connect an optical element andmovable relative to the fixed portion; a driving assembly, configured todrive the movable portion to move relative to the fixed portion; and aguiding assembly, configured to limit the movable portion to moverelative to the fixed portion, including: a support member, in directcontact with the movable portion, and the movable portion is movablerelative to the support member, and the support member is movablerelative to the fixed portion; a magnetic element; and a fixing member,corresponding to the magnetic element, wherein a force is between themagnetic element and the fixing member, the movable portion is movablyconnected to the fixed portion via the force, and both the magneticelement and the fixing member are movable relative to the supportmember; wherein the magnetic element includes a first magnetic elementsurface which has a plane structure that faces the fixing member, thefixing member includes a second magnetic element surface which has aplane structure, and the first magnetic element surface and the secondmagnetic element surface face each other and are parallel, and thesecond magnetic element surface faces the support member, and whenviewed in a direction that is perpendicular to the first magneticelement surface, the magnetic element does not overlap the supportmember.
 2. The optical driving mechanism as claimed in claim 1, furthercomprising a sensing element, configured to sense motion of the movableportion relative to the fixed portion, wherein the sensing elementcorresponds to the magnetic element.
 3. The optical driving mechanism asclaimed in claim 2, wherein the magnetic element is fixedly disposed onthe movable portion, and has a permanent magnet.
 4. The optical drivingmechanism as claimed in claim 1, wherein the movable portion has a firstmovable portion surface, the first movable portion surface is in directcontact with the support member, and the first movable portion surfaceis not parallel to the first magnetic element surface or the secondmagnetic element surface.
 5. The optical driving mechanism as claimed inclaim 4, wherein the movable portion has a second movable portionsurface, the second movable portion surface is in direct contact withthe support member, and the second movable portion surface is notparallel to the first magnetic element surface, the second magneticelement surface, or the first movable portion surface.
 6. The opticaldriving mechanism as claimed in claim 1, wherein the support member ismovable relative to the movable portion and the fixed portion.
 7. Theoptical driving mechanism according to claim 6, wherein the drivingassembly is at least partially fixedly connected to the support member.8. The optical driving mechanism as claimed in claim 1, wherein thedriving assembly includes a piezoelectricity element.
 9. The opticaldriving mechanism as claimed in claim 1, wherein the movable portion andthe fixing member form at least three contact areas to be in contactwith the support member.
 10. The optical driving mechanism as claimed inclaim 9, wherein the movable portion includes a holder and a slidingmember, and the sliding member is located between the holder and thesupport member.
 11. The optical driving mechanism as claimed in claim 9,wherein the three contact areas are formed by the sliding member and thefixing member.
 12. The optical driving mechanism as claimed in claim 1,wherein the fixing member has a rod structure.